If something can be easily exchanged for money or another good it is liquid. Many financial instruments, such as shares, bonds and currencies, are also fungible. It doesn't matter to Person A if they're repaid with a different $50 bill if Person A lends Person B a $50 bill. Person A can be repaid with two $20 bills and one $10 bill and still be...
Monero prefers CPU-based mining over GPU or specialized mining hardware, and its block sizes are dynamic and adjust in response to network traffic. Over time, the XMR mining reward for each block will decrease but reach a minimum amount to keep incentivizing miners. This mechanism means that there is no limit to the supply of XMR available....